Improvement in hydraulic jacks



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THoMAs II. WATSON',

PATENT OFFICE.

.OF NEY YORK, N. Y.

IMPROVEMENT IN HYDRAULIC JACKS.

Specification forming part ot' Letters Patent No. 411,358, dated ScptenibeIQO, 1864.

To all whom it may concern:

Be it known that I, THOMAS H. WATSON, of the city, county, and State of New York, have invented anImproved Hydraulic Jack; and do hereby declare that the following' is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Figure lis a sectional elevation of hydraulic jack, as patented under No. 8,203. Fig. 2 is a plan View of same. Fig. 3 is a sectional elevation of improved hydraulic jack. Fig. 4 is a plan View of same.

The nature of myinvention consists iu providing a reservoir holding fluids sut'cient, when forcedinto the cylinder of the jack, to push the ram out its entire length when it is in a horizont-a1 position, which is not accomplished by the. hydraulic jacks now in use and described in Fig. 1, in which the force-pump is in the center of the reservoir, and when the jack is in a horizontal position half the contents of the reservoir is below the center of the pump and cannot run into and supply it with water sufficient to more than one-third Iill the cylinder; consequently the ram is forced out only one-third of the distance required. The iiuid-reservoir on the upper or front side ofthe head, as drawn in Fig. 3, A, together with the ram B, containing sufcient water to till the cylinder When in ahorizontal position, thereby forcing out the ram the re quired distance.

I do not claim the invention of a portable hydraulic jack as patented under No. 8,203, and described in Fig. l; but

What I claim, and desire to secure by Letters Patent, is-

The duid reservoir on the upper or front side of the head when in a horizontal position, as described, and for the purposes set forth.

THOMAS H. WATSON. Witnesses:

ALBERT BAUMAN, BENJAMIN DAVIs. 

